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Portable power station runtime guide

Estimate how long a power station can run your equipment.

Add up the running load

Use measured power draw where possible. A power adapter’s rating can describe its maximum output rather than what the device usually draws.

Allow for conversion losses

Divide usable watt-hours by the total load in watts. At 80% usable capacity, a 500 Wh battery would supply about 400 Wh, or roughly eight hours at a constant 50 W.

Account for changes in draw

Actual runtime varies with power conversion, temperature, and how devices are used. For loads that cycle, measure energy over a representative period when possible.

Models to compare

Open the runtime tables and compare the same 100 W load across these three batteries. The difference shows how capacity affects runtime.

Open the power station calculator →